# Cannot migrate back

**URL:** <https://www.ruby-forum.com/t/cannot-migrate-back/163551>\
**Category:** Rails\
**Created:** [March 21, 2009, 9:41pm UTC](https://www.ruby-forum.com/t/cannot-migrate-back/163551 "2009-03-21T21:41:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![luma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/d6d6ee/32.png) [@luma](https://www.ruby-forum.com/u/luma)\
**Post date:** [March 21, 2009, 9:41pm UTC](https://www.ruby-forum.com/t/cannot-migrate-back/163551/1 "2009-03-21T21:41:29Z")

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hi,

I can’t run back my migrations on Ubuntu:

rake db:migrate works as expected. I.e. after that, schema\_migrations  
includes some numbers. Then I run this in ubuntu’s terminal:

user@ubuntu:~/project/src$ rake db:migrate version=0 --trace  
(in /home/user/project/src)  
\*\* Invoke db:migrate (first\_time)  
\*\* Invoke environment (first\_time)  
\*\* Execute environment  
\*\* Execute db:migrate  
\*\* Invoke db:schema:dump (first\_time)  
\*\* Invoke environment  
\*\* Execute db:schema:dump  
user@ubuntu:~/project/src$

Nothing happened, and schema\_migration includes the same numbers as  
before.

I have this problem with Rails 2.2.2 on Ubuntu 8.10 in development  
mode, but not with Rails 2.0.2 and Windows Vista, also development.

I’m wondering why nobody seems to have the same problem… How can I  
get it work?

Luma

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**Author:** ![luma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/d6d6ee/32.png) [@luma](https://www.ruby-forum.com/u/luma)\
**Post date:** [March 21, 2009, 9:47pm UTC](https://www.ruby-forum.com/t/cannot-migrate-back/163551/2 "2009-03-21T21:47:57Z")

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On Mar 21, 8:40 pm, Luma [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> hi,
> 
> I can’t run back my migrations on Ubuntu:
> 
> rake db:migrate works as expected. I.e. after that, schema\_migrations  
> includes some numbers. Then I run this in ubuntu’s terminal:
> 
> user@ubuntu:~/project/src$ rake db:migrate version=0 --trace

That should be VERSION=0 - it’s case sensitive (at least in the unix  
world)

Fred

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<div class="post-metadata">

**Author:** ![luma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/d6d6ee/32.png) [@luma](https://www.ruby-forum.com/u/luma)\
**Post date:** [March 21, 2009, 10:02pm UTC](https://www.ruby-forum.com/t/cannot-migrate-back/163551/3 "2009-03-21T22:02:35Z")

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> That should be VERSION=0 - it’s case sensitive (at least in the unix  
> world)

It’s case sensitive, because it goes into ENV[‘VERSION’], without  
embellishment,  
inside Ruby…

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<div class="post-metadata">

**Author:** ![luma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/d6d6ee/32.png) [@luma](https://www.ruby-forum.com/u/luma)\
**Post date:** [March 21, 2009, 10:27pm UTC](https://www.ruby-forum.com/t/cannot-migrate-back/163551/4 "2009-03-21T22:27:46Z")

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On Mar 21, 9:01 pm, Phlip [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> > That should be VERSION=0 - it’s case sensitive (at least in the unix  
> > world)
> 
> It’s case sensitive, because it goes into ENV[‘VERSION’], without embellishment,  
> inside Ruby…

ENV isn’t a hash though so ENV[] can do whatever it wants (perhaps if  
that was the norm for the platform in question - i don’t know enough  
about windows to comment). The ENV\_IGNORECASE #define in the ruby  
source seems particularly relevant.

Fred

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<div class="post-metadata">

**Author:** ![luma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/d6d6ee/32.png) [@luma](https://www.ruby-forum.com/u/luma)\
**Post date:** [March 21, 2009, 10:11pm UTC](https://www.ruby-forum.com/t/cannot-migrate-back/163551/5 "2009-03-21T22:11:56Z")

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thanks!